Allow implicit conversion from `TypedValue<B>` to `TypedValue<A>` if `B` is assignable to `A`. Example: ```c++ TypedValue<MemRefType> val; TypedValue<ShapedType> shapedVal = val; // this is now valid ```
Allow implicit conversion from `TypedValue<B>` to `TypedValue<A>` if `B` is assignable to `A`. Example: ```c++ TypedValue<MemRefType> val; TypedValue<ShapedType> shapedVal = val; // this is now valid ```